<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>滤镜</title>
    <style>
      img {
        /* 模糊滤镜效果 */
        /* filter: blur(10px); */

        /* 灰度滤镜效果 */
        filter: grayscale(100%);
      }

      img:hover {
        filter: none;
      }
    </style>
  </head>
  <body>
    <img src="img/lunbo.png" alt="" />
  </body>
</html>
